Robert Lewandowski netted his 24th Barcelona goal to help the Catalans beat Cadiz 2-0 and restore their eight-point lead at the top of LaLiga Sunday.
Champions Real Madrid's win at Osasuna the day before pulled them closer to Xavi Hernandez's side, who had one eye on Thursday's Europa League play-off second leg against Manchester United at Old Trafford.
However an inspired Ferran Torres helped Sergi Roberto to break the deadlock and Lewandowski added a second to win the game and leave Cadiz, 17th, two points above the relegation zone.
The visitors had two goals disallowed and made Barca uncomfortable at times at Camp Nou but their victory rarely seemed in doubt.
Xavi began with Roberto in midfield, replacing Pedri, who suffered a thigh injury in the Europa League 2-2 first leg draw with United last Thursday.
However it was Torres' arrival that made the difference for Barca in the first half.
The winger has struggled badly at times this season, largely left out of the picture, but with Ousmane Dembele injured and Raphinha rested to face United, the former Manchester City forward took his chance with both hands.
Torres was hyperactive, dribbling past defenders at pace and tying Cadiz's defence in knots.
One such run down the right saw him cross for Lewandowski after 43 minutes and although the Polish striker's effort was saved, Sergi Roberto was on hand to smash home the rebound.
Three minutes later Barca doubled their lead when Lewandowski collected the ball on the edge of the Cadiz box and fired a low strike into the bottom corner past Jeremias Ledesma.
Barca took their foot off the gas in the second half, although Lewandowski came close to a second with a lobbed effort that clipped the top of the crossbar.
LaLiga's top scorer with 15 goals, Lewandowski has not been at his sharpest since the World Cup but slowly seems to be returning to it.
Cadiz striker Roger Marti, who had a goal ruled out for offside early on, was infuriated as another was struck from the record in the second half.
Barca goalkeeper Marc-Andre ter Stegen was challenged by Cadiz defender Fali before Roger shot and the referee deemed the contact enough to be a foul.
Ter Stegen made a fine save to deny substitute Chris Ramos at the near post and keep yet another clean sheet, with Barca having conceded just seven goals from 22 matches in La Liga.
In Europe it has been another story, with Xavi hoping his side can prove more sturdy at the back against United than they were in the first leg.
RESULTS
Elche 0 Espanyol 1 (Darder 90+2)
Vallecano 1 (Lejeune 65) Sevilla 1 (Suso 29)
Atletico 1 (Griezmann 73) Athletic 0
Barcelona 2 (Roberto 43, Lewandowski 45+1) Cadiz 0
